Added "delete" button to book banners if owner of viewed shelf is the current user...

[wolnelektury.git] / apps / catalogue / models.py

diff --git a/apps/catalogue/models.py b/apps/catalogue/models.py
index b5970e9..133440b 100644 (file)
--- a/apps/catalogue/models.py
+++ b/apps/catalogue/models.py
@@ -97,6 +97,10 @@ class Book(models.Model):
     tagged = managers.ModelTaggedItemManager(Tag)
     tags = managers.TagDescriptor(Tag)
     
+    @property
+    def name(self):
+        return self.title
+    
     def short_html(self):
         if len(self._short_html):
             return mark_safe(self._short_html)
@@ -111,6 +115,8 @@ class Book(models.Model):
                 formats.append(u'<a href="%s">Plik PDF</a>' % self.pdf_file.url)
             if self.odt_file:
                 formats.append(u'<a href="%s">Plik ODT</a>' % self.odt_file.url)
+            if self.txt_file:
+                formats.append(u'<a href="%s">Plik TXT</a>' % self.txt_file.url)
             
             self._short_html = unicode(render_to_string('catalogue/book_short.html',
                 {'book': self, 'tags': tags, 'formats': formats}))
@@ -137,8 +143,11 @@ class Book(models.Model):
     has_html_file.short_description = 'HTML'
     has_html_file.boolean = True
 
+    class AlreadyExists(Exception):
+        pass
+    
     @staticmethod
-    def from_xml_file(xml_file):
+    def from_xml_file(xml_file, overwrite=False):
         from tempfile import NamedTemporaryFile
         from slughifi import slughifi
         from markupstring import MarkupString
@@ -146,7 +155,12 @@ class Book(models.Model):
         # Read book metadata
         book_info = dcparser.parse(xml_file)
         book_base, book_slug = book_info.url.rsplit('/', 1)
-        book = Book(title=book_info.title, slug=book_slug)
+        book, created = Book.objects.get_or_create(slug=book_slug)
+        if not created and not overwrite:
+            raise Book.AlreadyExists('Book %s already exists' % book_slug)
+        
+        book.title = book_info.title
+        book._short_html = ''
         book.save()
         
         book_tags = []
@@ -188,7 +202,8 @@ class Book(models.Model):
                 short_text = ''
                 if (len(MarkupString(text)) > 240):
                     short_text = unicode(MarkupString(text)[:160])
-                new_fragment = Fragment(text=text, short_text=short_text, anchor=fragment.id, book=book)
+                new_fragment, created = Fragment.objects.get_or_create(anchor=fragment.id, book=book, 
+                    defaults={'text': text, 'short_text': short_text})
                 
                 try:
                     theme_names = [s.strip() for s in fragment.themes.split(',')]
@@ -210,7 +225,8 @@ class Book(models.Model):
             book_themes = set(book_themes)
             book.tags = list(book.tags) + list(book_themes)
         
-        return book.save()
+        book.save()
+        return book
     
     @permalink
     def get_absolute_url(self):